Please, listen to user's feedback, don't be so conservative!

Of course it only works on last rank, but who do you think can reach last rank? They are people with lots of sales, and no sale brings you benefit, sometimes negatively impacts.

User would be wondering which account would be upgraded to premium, that makes them suspect. And may be they want their id to be easy to remember. Sometimes, they would register an account and buy premium manually, and uploader's benefit would be hurted.

Have you ever tried moving lots of files? 200 files? I sometimes wait for 5 minutes but it is still "working".

And please add two more functions as I said above. Uploaders like I would feel them really useful.

Thanks and best regards